Adjusting the thread tension for whip stitch – SINGER 1371A2 User Manual
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3) Adjust tension controller No. 2
®
for proper tension of the pallarel side seams by
judging from the stitch formation.
* Adjusting the thread tension for whip stitch:
1) Adjust the bobbin thread tension to approx. 40 to 50g by adjusting screw © of the
bobbin case.
2) Exchange the adjusting springs of tension controllers No. 1© and No.2
®
each other
(the tension controller No.2 will have a weak spring).
3) Adjust tension controller No.2
®
to prevent ravelling off at the end of a seam.
4) The stitches of the parallel sides or bar-tack can be adjusted by tension controller No. 1
®.
* Adjusting the thread take-up spring (for purl stitch)
The suitable range of the stroke of thread take-up spring © is from 6 to 8mm with a
starting tension of 20 to 50g.
For adjusting the stroke of the thread take-up spring, loose screw ©, and insert a thin
screwdriver into the slit of tension post © to turn the tension post.
To adjust the tension of the thread take-up spring, insert a thin screwdriver into the slit
of tension post ® to turn it, with screw © tightened. The tension of the thread tade-up
spring increases when the tension post is turned clockwise, and decreases when turned
counterclockwise.
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